About The HR Final Boss Leak...

So, from what we've seen, Wilds is pulling a Rise, and releasing without a proper High Rank Final Boss, instead having Flying Wyvern Arkveld be the final unlockable hunt, essentially making the game unfinished. This, along with the Monster Size Achievement pointing towards Seregios and Lagiacrus possibly being Title Updates, has got me very concerned about the game's reception in the community at launch. I honestly don't see many good things being said about it, and it probably is gonna impact sales. Any thoughts on this?